let arr = [
    {
        "title": "肖申克的救赎 / The Shawshank Redemption",
        "star": "9.7",
        "pic": "https://img2.doubanio.com/view/photo/s_ratio_poster/public/p480747492.jpg"
    },
    {
        "title": "霸王别姬",
        "star": "9.6",
        "pic": "https://img1.doubanio.com/view/photo/s_ratio_poster/public/p2561716440.jpg"
    },
];

let arr2 = arr.map(obj => [obj.title, obj.star, obj.pic]);
arr2 = [["title","star","pic"],...arr2]
console.log(arr2)